Annotation of src/etc/netstart, Revision 1.104
1.1 deraadt 1: #!/bin/sh -
2: #
1.104 ! djm 3: # $OpenBSD: netstart,v 1.103 2005/04/03 19:39:31 deraadt Exp $
1.101 millert 4:
5: # Strip comments (and leading/trailing whitespace if IFS is set)
6: # from a file and spew to stdout
7: stripcom() {
8: local _file="$1"
9: local _line
10:
11: {
12: while read _line ; do
13: _line=${_line%%#*} # strip comments
14: test -z "$_line" && continue
15: echo $_line
16: done
17: } < $_file
18: }
1.45 millert 19:
20: # Returns true if $1 contains only alphanumerics
21: isalphanumeric() {
22: local _n
23: _n=$1
24: while [ ${#_n} != 0 ]; do
25: case $_n in
26: [A-Za-z0-9]*) ;;
27: *) return 1;;
28: esac
29: _n=${_n#?}
30: done
31: return 0
32: }
1.81 angelos 33:
1.83 miod 34: # Start the $1 interface
35: ifstart() {
1.84 deraadt 36: if=$1
1.83 miod 37: # Interface names must be alphanumeric only. We check to avoid
38: # configuring backup or temp files, and to catch the "*" case.
1.84 deraadt 39: if ! isalphanumeric "$if"; then
1.83 miod 40: return
41: fi
42:
1.84 deraadt 43: ifconfig $if > /dev/null 2>&1
1.83 miod 44: if [ "$?" != "0" ]; then
1.89 markus 45: # Try to create interface if it does not exist
46: ifconfig $if create > /dev/null 2>&1
47: if [ "$?" != "0" ]; then
48: return
49: fi
1.83 miod 50: fi
51:
52: # Now parse the hostname.* file
53: while :; do
54: if [ "$cmd2" ]; then
55: # We are carrying over from the 'read dt dtaddr'
56: # last time.
57: set -- $cmd2
58: af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" cmd2=
59: # Make sure and get any remaining args in ext2,
60: # like the read below
61: i=1
62: while [ i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done
63: ext2="$@"
64: else
65: # Read the next line or exit the while loop.
66: read af name mask bcaddr ext1 ext2 || break
67: fi
68: # $af can be "dhcp", "up", "rtsol", an address family,
69: # commands, or a comment.
70: case "$af" in
71: "#"*|"") # skip comments and empty lines
72: continue
73: ;;
74: "!"*) # parse commands
75: cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
76: ;;
77: "bridge")
1.84 deraadt 78: cmd="echo /etc/hostname.$if: bridges now supported via bridgename.* files"
1.83 miod 79: ;;
80: "dhcp")
81: [ "$name" = "NONE" ] && name=
82: [ "$mask" = "NONE" ] && mask=
83: [ "$bcaddr" = "NONE" ] && bcaddr=
1.84 deraadt 84: ifconfig $if $name $mask $bcaddr $ext1 $ext2 down
85: cmd="dhclient $if"
1.103 deraadt 86: setgateway=N
1.83 miod 87: ;;
88: "rtsol")
1.84 deraadt 89: ifconfig $if $name $mask $bcaddr $ext1 $ext2 up
90: rtsolif="$rtsolif $if"
1.83 miod 91: cmd=
92: ;;
93: "up")
1.84 deraadt 94: # The only one of these guaranteed to be set is $if.
1.83 miod 95: # The remaining ones exist so that media controls work.
1.84 deraadt 96: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
1.83 miod 97: ;;
98: *)
99: read dt dtaddr
100: if [ "$name" = "alias" ]; then
101: # perform a 'shift' of sorts
102: alias=$name
103: name=$mask
104: mask=$bcaddr
105: bcaddr=$ext1
106: ext1=$ext2
107: ext2=
108: else
109: alias=
110: fi
1.84 deraadt 111: cmd="ifconfig $if $af $alias $name "
1.83 miod 112: case "$dt" in
113: dest)
114: cmd="$cmd $dtaddr"
115: ;;
116: [a-z!]*)
117: cmd2="$dt $dtaddr"
118: ;;
119: esac
120: if [ ! -n "$name" ]; then
1.84 deraadt 121: echo "/etc/hostname.$if: invalid network configuration file"
1.83 miod 122: return
123: fi
124: case $af in
125: inet)
126: [ "$mask" ] && cmd="$cmd netmask $mask"
127: if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
128: cmd="$cmd broadcast $bcaddr"
129: fi
1.91 deraadt 130: [ "$alias" ] && rtcmd=";route -qn add -host $name 127.0.0.1"
1.83 miod 131: ;;
132: inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask"
133: cmd="$cmd $bcaddr"
134: ;;
135: *)
136: cmd="$cmd $mask $bcaddr"
137: ;;
138: esac
139: cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
140: ;;
141: esac
142: eval "$cmd"
1.84 deraadt 143: done < /etc/hostname.$if
1.83 miod 144: }
145:
146: # Start the $1 bridge
147: bridgestart() {
148: # Interface names must be alphanumeric only. We check to avoid
149: # configuring backup or temp files, and to catch the "*" case.
150: if ! isalphanumeric "$1"; then
151: return
152: fi
153: brconfig $1 > /dev/null 2>&1
154: if [ "$?" != "0" ]; then
1.90 millert 155: # Try to create interface if it does not exist
156: ifconfig $if create > /dev/null 2>&1
157: if [ "$?" != "0" ]; then
158: return
159: fi
1.83 miod 160: fi
161:
162: # Now parse the bridgename.* file
163: # All lines are run as brconfig(8) commands.
164: while read line ; do
165: line=${line%%#*} # strip comments
166: test -z "$line" && continue
167: case "$line" in
168: "!"*)
169: cmd="${line#*!}"
170: ;;
171: *)
172: cmd="brconfig $1 $line"
173: ;;
174: esac
175: eval "$cmd"
176: done < /etc/bridgename.$1
177: }
178:
1.81 angelos 179: # Re-read /etc/rc.conf
180: . /etc/rc.conf
1.1 deraadt 181:
1.83 miod 182: # If we were invoked with a list of interface names, just reconfigure these
183: # interfaces (or bridges) and return.
184: if [ $1x = autobootx ]; then
185: shift
186: fi
187: if [ $# -gt 0 ]; then
188: while [ $# -gt 0 ]; do
189: if [ -f /etc/bridgename.$1 ]; then
190: bridgestart $1
191: else
192: ifstart $1
193: fi
194: shift
195: done
196: return
197: fi
198:
199: # Otherwise, process with the complete network initialization.
200:
1.1 deraadt 201: # /etc/myname contains my symbolic name
1.87 henning 202: if [ -f /etc/myname ]; then
1.100 millert 203: hostname=`stripcom /etc/myname`
1.87 henning 204: hostname $hostname
205: else
206: hostname=`hostname`
207: fi
208:
1.1 deraadt 209: if [ -f /etc/defaultdomain ]; then
1.100 millert 210: domainname `stripcom /etc/defaultdomain`
1.4 dm 211: fi
212:
1.93 deraadt 213: # Set the address for the loopback interface. Bringing the
214: # interface up, automatically invokes the IPv6 address ::1)
1.92 deraadt 215: ifconfig lo0 inet 127.0.0.1
1.24 kstailey 216:
1.54 itojun 217: if ifconfig lo0 inet6 >/dev/null 2>&1; then
218: # IPv6 configurations.
219: ip6kernel=YES
220:
1.83 miod 221: # Disallow link-local unicast dest without outgoing scope identifiers.
1.98 deraadt 222: route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 223:
1.83 miod 224: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 225: # If you configure site-locals without scope id (it is permissible
226: # config for routers that are not on scope boundary), you may want
227: # to comment the line out.
1.98 deraadt 228: route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 229:
1.83 miod 230: # Disallow "internal" addresses to appear on the wire.
1.98 deraadt 231: route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.66 itojun 232:
1.83 miod 233: # Disallow packets to malicious IPv4 compatible prefix.
1.98 deraadt 234: route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
235: route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
236: route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
237: route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
1.66 itojun 238:
1.83 miod 239: # Disallow packets to malicious 6to4 prefix.
1.98 deraadt 240: route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
241: route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
242: route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
243: route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null
1.66 itojun 244:
245: # Completely disallow packets to IPv4 compatible prefix.
246: # This may conflict with RFC1933 under following circumstances:
247: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 248: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 249: # support. Under RFC1933, it should transmit native IPv6
250: # packets toward IPv4 compatible destination, hoping it would
251: # reach a router that forwards the packet toward auto-tunnel
252: # interface.
1.77 deraadt 253: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 254: # destination. A KAME node is acting as an IPv6 router, and
255: # asked to forward it.
1.77 deraadt 256: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 257: # with it, we disable it by default.
1.98 deraadt 258: route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.56 itojun 259:
260: rtsolif=""
1.54 itojun 261: else
262: ip6kernel=NO
263: fi
264:
1.83 miod 265: # Configure all the non-loopback interfaces which we know about.
266: # Refer to hostname.if(5) and bridgename.if(5)
1.47 niklas 267: for hn in /etc/hostname.*; do
1.83 miod 268: # Strip off /etc/hostname. prefix
269: if=${hn#/etc/hostname.}
1.85 todd 270: test "$if" = "*" && continue
1.47 niklas 271:
1.83 miod 272: case $if in
1.95 mcbride 273: "carp"*|"gif"*|"gre"*|"pfsync"*)
274: # CARP, GIF, GRE and PFSYNC interfaces need the routes to be setup
1.88 david 275: # before they are configured.
1.83 miod 276: continue
277: ;;
1.55 todd 278: *)
1.83 miod 279: ifstart $if
1.55 todd 280: ;;
1.47 niklas 281: esac
1.50 deraadt 282: done
1.56 itojun 283:
284: if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
285: fw=`sysctl -n net.inet6.ip6.forwarding`
286: ra=`sysctl -n net.inet6.ip6.accept_rtadv`
287: if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then
1.57 itojun 288: echo "IPv6 autoconf:$rtsolif"
1.56 itojun 289: rtsol $rtsolif
290: else
291: echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf"
292: fi
1.57 itojun 293: fi
294: if [ "$ip6kernel" = "YES" ]; then
295: # this is to make sure DAD is completed before going further.
296: sleep `sysctl -n net.inet6.ip6.dad_count`
1.56 itojun 297: fi
298:
1.102 mcbride 299: # The pfsync interface needs to come up before carp.
300: if [ -f /etc/hostname.pfsync0 ]; then
301: ifstart pfsync0
302: fi
303:
304: # Configure all the carp interfaces which we know about.
305: # They must come up after pfsync but before default route.
306: for hn in /etc/hostname.*; do
307: # Strip off /etc/hostname. prefix
308: if=${hn#/etc/hostname.}
309: test "$if" = "*" && continue
310:
311: case $if in
312: "carp"*)
313: ifstart $if
314: ;;
315: *)
316: # Regular interfaces have already been configured.
317: continue
318: ;;
319: esac
320: done
321:
1.14 deraadt 322: # /etc/mygate, if it exists, contains the name of my gateway host
323: # that name must be in /etc/hosts.
1.104 ! djm 324: if [ "X${setgateway}" != X"N" -a -f /etc/mygate ]; then
1.97 deraadt 325: route -qn delete default > /dev/null 2>&1
1.100 millert 326: route -qn add -host default `stripcom /etc/mygate`
1.14 deraadt 327: fi
1.44 deraadt 328:
1.48 niklas 329: # Multicast routing.
330: #
331: # The routing to the 224.0.0.0/4 net is setup according to these rules:
332: # multicast_host multicast_router route comment
333: # NO NO -reject no multicast
334: # NO YES none installed daemon will run
335: # YES/interface NO -interface YES=def. iface
336: # Any other combination -reject config error
337: case "$multicast_host:$multicast_router" in
338: NO:NO)
1.91 deraadt 339: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
1.67 deraadt 340: ;;
1.48 niklas 341: NO:YES)
342: ;;
343: *:NO)
344: set `if [ $multicast_host = YES ]; then
1.91 deraadt 345: ed -s '!route -qn show -inet' <<EOF
1.48 niklas 346: /^default/p
347: EOF
348: else
349: ed -s "!ifconfig $multicast_host" <<EOF
350: /^ inet /p
351: EOF
352: fi`
1.91 deraadt 353: route -qn add -net 224.0.0.0/4 -interface $2 > /dev/null
1.67 deraadt 354: ;;
1.48 niklas 355: *:*)
356: echo 'config error, multicasting disabled until rc.conf is fixed'
1.91 deraadt 357: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
1.67 deraadt 358: ;;
1.48 niklas 359: esac
1.83 miod 360:
1.102 mcbride 361: # Configure all the gif and gre interfaces which we know about.
1.83 miod 362: # They were delayed because they require the routes to be set.
363: for hn in /etc/hostname.*; do
364: # Strip off /etc/hostname. prefix
365: if=${hn#/etc/hostname.}
1.85 todd 366: test "$if" = "*" && continue
1.83 miod 367:
368: case $if in
1.102 mcbride 369: "gif"*|"gre"*)
1.83 miod 370: ifstart $if
371: ;;
372: *)
373: # Regular interfaces have already been configured.
374: continue
375: ;;
376: esac
377: done
1.92 deraadt 378:
1.99 itojun 379: # reject 127/8 other than 127.0.0.1
1.92 deraadt 380: route -qn add -net 127 127.0.0.1 -reject > /dev/null
1.83 miod 381:
382: # Configure all the bridges.
383: for bn in /etc/bridgename.*; do
384: # Strip off /etc/bridgename. prefix
385: if=${bn#/etc/bridgename.}
1.85 todd 386: test "$if" = "*" && continue
1.83 miod 387:
388: bridgestart $if
389: done
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